We’re told by B&H Photo that this deal on the EF 70-200 f/2.8L IS II will end very soon.

From B&H Photo

B&H Photo is selling the Canon EF 70-200 f/2.8L IS II for $1899 after rebates for a very limited time. You must begin the checkout process to see the $2199 in cart price. There is a $300 mail-in rebate to bring the price down to $1899

I've never purchased from BuyDig, but he has good positive feedback, and as far as I can see, he sold forty five 70-200 2.8ii lenses for the past 24 hrs. In addition, he offers 30 days for returns. I think you should be fine, especially since CR guy recommended him. Enjoy your lens!